Thank you, David, Cap, puf, and aikanae.
I really wanted to avoid having battery issues...I don't understand electrical theory and I'm probably better off not dealing with that stuff. I just want to mention that I do cryptic crosswords, so I'm not deficient in all areas (lol).
I did order that LEO, basically because it had slightly more juice than what I've been using, and though it would be an easy transition. I will look at some of the pretties you referenced and see what sounds like something I would feel comfortable with. I'm aware of the Vapocolypse, and I do understand that it will be vital to be prepared for it.
BTW, I was recently diagnosed with a breathing issue as having mild OPD...the X-ray was spotless, but a test i had back in the spring showed a touch of emphysema. After 45 years of smoking, not too bad.